Most film directors are known for their work with one regional industry, while many others are active directors of films from multiple industries.
Many of the directors were graduates of the Film and Television Institute of India, Pune.
Ritwik Ghatak was a professor at the institute and a well-known director in his own right.
The best-known Indian "neo-realist" is Satyajit Ray.
This does not include directors who work in a single industry whose films have been dubbed into other languages.